Abrading apparatus



Aug- 28, 1945- E. THOMPSON v l I 2,383,829

ABRADING APPARATUS Filed March 12, 1943 sheets-sheet '1 &\\ QQ ng Q n Q 0% o N q` bw T a w @I Y .Q

C) O I @@O@ Wx M @l 'MQ l Aug. 28

, 1945. 1 E. THOMPSON ABRADING vAPInLuRATUs Filed March l2, 19415 '7 Sheets-Sheet 2 l.. E. THOMPSON ABRADING APPARATUS Aug. 28,'1945. y

Filed March 12, 1943 '7 Sheets-Sheet 3 Lfiwmym 3mm/Km L. E; THOMPSON ABRADING APPARATUS Aug. 2s, 1945.

7 sheets-sheet' 5 Filed March l2, 1943 f Aug.v Z8, 1945. L E. THoMPsoN ABRADING APPARATUS Filed March 12, 1943 '7 Sheets-Sheet 7 Patented Aug. 28, 1945 UNITED; SrATEs "PA-'r y Loren E. Thompson, Parker sbu'rg'vl'(. I; Application -March 12, 1943, Serial No.' 478,925

` 7. Claims;` (ci. 51fz`17) j l L This invention relates to grinding machines.

An object of this invention is to provide a machine of this type which includes ra reciprocall carriage movable transverselyto the` axis of the abrader or grinding wheel, the carriage beingrefy ciprocated by an improved hydraulic operator,

Another object of this invention is to` provide in a machine of this type, a hydraulic'operator for shifting the'carriage toward or from the abrader.

in a machine of this typev an improved longitudinal operator for the carriage which is so constru'cted as to take up a minimum of space sothat the maximum longitudinal carriage movement` may be obtained in a space equal to the total length of such maximummovement. n i d 1 y A yfurther object of this invention is to pr'ovide in a machine of this type an improved vcarriage and work support; the latterincluding 'a' laterally shiftable saddle base and means for piv otally adjusting the saddle base relative to the support whereby the work may be xedvto the work support and the latter shifted aboutv a vertical axis to thereby permit grinding of angu-4 larly related faces on the work without shifting`v the work relative to the support. y

A further object of this invention isto provide in a machine of this type, a supportingbase, a saddle base slidable laterally of the supporting base, the sldable connections between the saddle base and the supporting base being 'of such cony struction thatthe saddle base maybe angularly adjusted in a horizontal plane.

A further object of this invention is to provide in a machineof this type an improved supporting base, a saddle base slidably carried by the supporting base, a saddle rockably carried bythef saddle base, and a common' lockingfmeans`v for locking the supporting base, saddle base and saddle against movement one relative to the other, so that the operator of the machine will not inadvertently leave one of these members in an unlocked position. n

A further object of this invention is to provide l in a machine of this type an improved saddle base* and saddle with means for rockably adjusting the saddle. u A further object of this inventionis to provide in a machine of this type an automatically adjustable shield for the saddle so as toprevent any particles from entering between the saddle and the saddle base n The invention consists of the novel construc, tion, combination and arrangement yof parts'as d n l A further object of this invention is to'provide the scope 'of the invention will be more specifically referred toand illustratedv in the accompanying drawings, but it is to beunders'todthat "changes, variations and modication'sf 'mayffbe' "resort-,edA ,to which fall` within 4 I as claimed.` In the drawings? l Figure 11 is a 'detail front elevation of a grinding `or Aabradingf machinek constructed according man' embodiment oftnis invention, Figure `2 'is a detail end elevationof the ma- Chine, y' l' 7. Y Y

Figure 3 is a fragmentary sectional View taken ontheiin'e 3-3 ef'rigur'e'i, Y y

' Figure 4 isa fragmentary sectional view taken Figure e is ai 'fragmentary tqppian ypartly in' section ofthe saddle base, l Y

Figure 7 is a fragmentary sectional view taken on the une 1 1 'ofjFigure 5, n

Figurel 8 is a fragmentary sectional View taken on the line 8-8 ofV Figure l Figure 9 isa fragmentary sectional view taken on the line 9-4-9'of Figure 4, f l

I Figure-il() is a fragmentary sectional view taken on the 1ine `|o-|oorr'igure 5, v 1

Figure 11 is an endelevation of the saddle base removed from the support, 'i

Figure 12'is ay fragmentary sectional view taken on the line |2-l2 or Figure 1', y n l Figure 13 is a fragmentary plan View showing the connectionbetween 'thel saddle base' and the operatortherefor, and

Figure 14 isa fragmentary sectionalview taken on the line'M-M f Figure 13. l

Referring to the drawings, the numeral I5 designates generally a lba'se ystructure including a base member I6 and an upstanding hollow standard Il rising from the base member I6. A motor or powerimembe'r If8`*is mounted on the upper end of the s`tandard"l'lv and has secured to the armature shaft l 97 thereof a pair of abrader holders 20 andZlI within which lalo'radingwheels 22 and 23, respective1y, are secured.

' The machine includes alpair of vertically adjustalble knees orfsupporting members 24 and 25 'which are"correlatedv with the abradingmemibers 22 and 23, respectively.; The knee or sup-r,

portingmember 2 4 is sli-dably carried by the standard AI IJIQeing slidalofle inl vertically disposed guides 2S carried'byone sidejof thestandard I l.` n 'I he knee or support d 25j l is l slidably carried 'by thekoppositevside of the standard: 1 1, being slidable on guides 21 carried by the standard I1 opposite from the .guides 26. The knee 24 has mounted on the upper side thereof a saddle base or carriage 28 and a saddle 29 is adjustably carried by the saddle base 28. j

A longitudinally movable work support 30 is carried by the saddle 29, lbeing movable in a direction parallel with the adjacent face of theabrading wheel or member 22. The knee 25 has slidthe saddle :base 28. The saddle 29 is also formed ably mounted on the upper side thereof a saddle v ibase or laterally shiftable carriage-3 lL and a rockable saddle 32 is *carriedby the saddle base 3l. The saddle 32 has mounted thereon a longitudinally movable work support 33 which is movi able in a direction parallel with the adjacent face of the abrading member 23. The Ifneee'om" structions 24 and 25 with the apparatusmounted on Ythe upper side thereof are of identical con'` struction,v and the description kof `one of these members with the apparatus lcorrelated therewith will apply equally as well to the other member.

able. f-.Thewknee orA vertioallyshiftable support L2 4 has formed. integral with the opposite ends there; 1

, ,2O l .The knees24 and 25 are independently operable and. like,manne r the 4saddle basesv and the.`

work supports 3.9and 33 are, independently -oper of a pair of upstanding guides 34-and 35, the

guide534rbeingprovided in the upper side thereof with aninver-ted A'truncated ,keywoy .36; V',I'he guide f is provided in the upper siderthereorwith an inverted -trunated-keyway 31, The central portion of the knee or support 24 is formed witha.k

guide Kmemberwi Which-has the,- upper face- 39 thereof Idisposed slightly below -the horizontal plane of.- the uppersides 40 and 4I ofv the guide members 34 and 35, respectively. t

` Thesaddle -base 28 in-the center thereof isv formed with `anrnlarged Fbaseportion 42 which isprovided inthelower side thereof with arcuate T-shapedV channels 43. Aplate44 is interposed between the lower side of thebase member 42 and the upper side of the guidemember-39 and, is

formedwithdependingl Vguide* members 45. on the opposite sides thereof which slidably engage thel guide orlkeymember 38. Auplurality of headed bolts 4s are eiit'ended through the guide members 45 andhavel the heads4'zl` thereof engaging in the T-shaped slots 4 3; Thelbase'Z Ais `pivotally secured to the platei44gby menszof a central pivot pin 48 extending through'the base; member.42 and into the plate 44,- .The `lower-fendI of the pin 48 is adapted to reston the upper side-39 of the guide orley member 38. `The boltslV with the heads 4 'Il provide a means .whereby the saddle base 284 may be swung'in a horizontal plane and then lockedin its l adjusted `position .with respect to the knee or support-,24. guide member 38.

I fber 50,H The two keymembers or vslides 49 and 59l are of like constructimV and are adjustably locked with respecty to the saddle base 28. The lookin-gmeans for thetwo keys or slide members 49 and 50 are of identical construction and are Lshown in greater detail in Fig-lures 4 and 9," The key'member 5D is formed Awith an opening 5l which'is substantiallyv elliptical in top'plan with the longaxi's of the opening lFit extending length-` wiseof'the saddlez; vThe key member 50Vis also formedwith a second substantially elliptical recess52 LWhichcQmmimiCates with the lower end adaj cent the opposite ends thereof and in the convex lower side with T-shaped slots or channels 55. A saddle locking or clamping bolt 5B is adapttoengage in the T-sha'ped` slot 55'and the bolt y56 extends downwardly through the b'ase 28 and vlinto the key or slide member 50. A cylindrical per end of thevnu'tmemberl 5l being rotatably disposed, inl-ranA ,openingy 6l formed in the saddle base.28-., A-worm62 jis' carried byiya worm shaft 63 which is journaHed in the saddle base 28 extending inwardlywfromthe forward side thereof and disposedon a downward inclination with respect tothe horizontal..v The yworm 62 is adapted to mesh with the worm gear 60 so that rota- .tion ofthe shaft 83 by -means of4 a handle G4 whichis secured to the outer end thereof will tighten or' loosen .the nut 5l and tighten or loosen 'the-bolt 56. .-,Rotationof the nut .5l will also havetkthevv effect of tightening` or loosening the key member 50 with respect to the saddle base 28 so that whenthe saddle base 28 is swung about the pivot vmember'` 48, `the elliptical 'openings 5| and. 52l Willlfprcvide compensatingfmeans to permit the horizontal swinging of the saddle base 28 Without-'a correspondingswinging of the keymembers 49 rand 50. t t

vThe saddle member 29 is provided with a pair of innervTshaped slots-65 and T-,shaped bolts 66 engage in thervslots `65 and extend downwardly throughv openings 8l formed in the saddle base 28. Manually adjustable nuts 98 are threaded on the lower endsof the bolts ,96 and these nuts are positioned betweenthe.- upwardly projecting guide members 34 and 35 and the slide members 45. In orderfto provide a means whereby the saddle 29 may be rocked1 onthesaddle seat 54, I have provided at a point betweentthe ends of the saddle 29' worm gear teethvSS A worm Hi is adapted -to-mesh with ythe .worm gear teeth 89 and is mounted on'a'shaft 1| lextending inwardly from the forward side of the saddle base 28. The outer end of yth'eshaft 'H hassecuredthereto a handle I2 so that thefshaft 'Il may be rotated to adjust the saddle 29.. j

In order to provide a means whereby the material :removed by the abrading member 22 will be preventedl .from working into the seat 54, Iv

have provided on the front and rear sides of the saddle29 a pair-of lexible shields or guards 13 and l4r-respectively Theshield 131s secured by fasteningvmeansj-lto the saddle 29 adjacent the junction between the saddle 29 and the lower side of the worksupport ,30. 4The shield or guard 13 is mountedf cna spring roller `I6 which is carried by therforward side of kthe saddle vbase 28 and `the roller 'I6 is adapted vto maintain the extended portion of the shield or guard 13 in a taut condition. The guard or shield i4 is secured by fas- `ytelling]means Tito ltheupper portion of the `the upper side of the cylinder 10.

saddle 29 and the guard or shield 14 is wound on a spring roller 18 carried by the upper rear portion of the saddle base 28. f

The header guide 38 in the central portion thereof is provided with a horizontally disposed cylinder 19 which has .heads 80 and 8| secured by fastening devices 82 and 88, respectively,y to

the front and rear ends thereof.; Acylindrical sleeve 84 is rotatably mounted in the cylinder` 19 and at its forward end abuts against .a thrust anti-friction bearing V85.v The rear end of the sleeve 84 abuts against a rear anti-friction bearing 86. A piston 81 is slidable in the sleeve 84 and the sleeve 84 is formed with a longitudinally extending spiral slot or passage 88. The passage 88 at its forward end communicates with anannular channel 89 which lisformed in the. outer side of the sleeve 84 and the rear end of the slot or passage 88 communicates with anannular passage 90 formed in the outer side of the sleeve 84 adjacent the rear end thereof. r The-'cylinder 19 adjacent the forward end is -provided with a fluid port 9| with which a fluid conducting'pipe 92v communicates.

The cylinder 19 is also provided adjacent-the rear end thereof with a fluid port 93 `communicating with the passage 9|) and a'pipe 94 communicates with the port or duct 93. The two uid conducting pipes 92 and 94 are connected toa common valve 95 which is connected to a fluid pressure pipe line 96 so that uid underpressure may be selectively discharged into a selected end of the sleeve 84, in order to move the piston 81 in a selected direction. A returnpipe 91 is also connected with the valve 95 so that when the fluid under pressure is flowing to one end of the sleeve 84, the fluid inthe other end of the sleeve 84 may return through the pipe 91 and the valveA 95 to-the source of uid pressure supply (not shown). The valve 95 may be manually operated, and if desired, suitablecontrols may be connected with the valve 95 for adjusting thisvalve from the adjacent front side of the knee orsupporting member 24. It is also contemplated-that the valve 95 be automatically adjusted so asV t0 provide for the automatic advancement of the saddle base 28 toward the abrading wheel or member 22 after each passage of the work support 30 across the face of the wheel 22.

The piston 81 has secured thereto an upwardly extending connecting member 98 'which has a portion 99 thereof projecting throughthe slot or passage 88. The connecting member 98 slidably engages in a longitudinally disposed straight'slot or passage |00 which is'formed in An upwardly extending lug extends from the connecting member 98 anda pin |02 extends-through the lug IOI. 'Ifhe pin |02 is disposed in a recess |03 which is formed in the base 44 and the pin |03` is locked against endwise movement by means of a plate |04 formed with an end flange |05 abutting against one end of the pin |02. The

plate |04 is countersunk in a recess |08 formed the work support is adapted to slidably engage. The saddle 29 at a point below the keyway or guide passage |08 is formed with a cy-` provided with' ai longitudinally extending spiralslot I I2 thrugh which extends a connecting link II3 which connects a piston I I4 slidable in the sleeve III ,with the slide member or key |09. The link II3 is secured within the key or slide |09 by means of a pin I|5 which is formed with a reduced threaded stud IIS threaded into the key I 09 as shown in Figure 12.

' The saddle 29 is provided near the upper portion thereof with an opening II1 and the key or slide member |09 is provided with an opening I I8 which is Vadapted to register with the opening II1 so thatA the pin |I5 may be extended through the aligned openings I I1 and l I 8 and threaded in operative position within the key member |09. The provision 'of the connecting link or member 98'between the saddle base 28 and the piston 81 provides for the elimination of the usual -conneet-ing rod which in most instances extends axially of the hydraulic piston and therefore p rovides an improved -means whereby the maximum movement may be obtained for the saddle base 28 in a given space. This given space may be equal to the maximum movement of the saddle base 28y in either direction toward or away from the abrading wheel or member 22.

. The improved connecting link and operator for the'saddle base 28 also provides for the complete enclosing of the operating means for the saddle base so Athat no material removed from` the work will contact with any of the operating parts of the saddle base operator. The provision of the self-contained operator for the Work support -30 also provides means whereby the maximum movement lengthwise of the saddle 29v may vbe obtained for the work support 30, and the operating means for the work support will be entirely enclosed so that the removed abrasive Ormaterial will not interfere with the proper reciprocation of the work support under the" movement of. the work support operating piston I I4.

In the use and operation of this machine, th motor I8 is connected to a source of electric current supply for rotating'the abrasive members 22 and 23. The work is mounted on the upper side of the work support 30 and the entire carriage,

which includes the saddle base 28, the saddle 20` and the work support 30, may be moved toward the wheel 22 by adjusting the valve95 in order to effect inward movement of the piston 81. Where the work is to be ground with only a. single flati'ace, the work may have such face disposed in parallel relation with the outer face 0f the abrasive wheel 22. However, if the work is to be formed with one or more angular faces,

the saddle base 28 rmay be angularly adjusted vwith respect to the supporting member 24.

This adjustment is obtained by loosening the bolts 66 and then loosening the nuts 51 which will release the slide or key members 49 and 50. The bolts 46 may then be loosened and the saddle base 28 swung about the axis of the pin 48. 'I'his angular adjustment in a horizontal plane may be within a predetermined limitation depending only on the long axes of the elliptical openings 5I and 52 in the key members 49 and 50.

When the saddle base28 has been angularly adjusted tothe desired degree, the handles secured to the two shafts 63 may be turned to lock the bolts 58, locking thereof tightening the the key member 5B to the saddle base' 28. Where a. right angular adjustment is desired to dispose the upper side of the `work support 30 on an angle to the horizontal, the saddle 29 may be rock--- ably adjusted yby-rotating the handles 64 to 'shift the' locked nuts 51 to a released position. The bolts 6T may also be loosened whereupon the saddle adjusting shaft H may be rotated in the' desired direction to rock the saddle 29 in the sadidle seat 54.' Rocking of the saddle 29 in eitherdirection will cause one fof the guards or shields to be wound upon its correlated winding drum and the other'of the shields will be pulled or y unwound from' its correlated Winding drum.

When the saddle 29 has been angularly adjusted tothe desireddegree the lock nuts 51 may be turned by rotation of the shaft B3 and the worm-62 to causetightening ofthe bolt 56 and the nut 5l. When the two nuts 51 disposed adjacent the opposite ends of the saddle base 28 are locked tight with respect to thesaddle base 28, this latter member Ymay be moved toward or away from the abrading wheel 22 in its angularly adjusted position, and in the circumferen tial position of the saddle l25with respect t0. the concave saddle seat 54. 4

It will be apparent fromtheforeg'oing' that the work may be adjusted angularly with respect to the working face of the abrading wheel 22 in right angularly disposed planes, and may be,

shifted toward or'away from the work in a plane parallel with the axis of the abrading member 22. By providing for the movement of the saddle base and the worksupport under the action of hydraulic operators which are independently actuated, it is possible to provide for a greater precision in the grindingor abrading operation thantis possible where screw threads `or gears are used for actuating these elements. It is ofi course well known that threaded shafts and gears gradually wear down and such wearing thereof prevents any precision' work being performed by the abrading wheel 22; However, through the provision of the hydraulic operators, the wear on the operating parts of the operators is substantially eliminated so that it is possible to obtain precision abrading or grinding to a very close degree.

What I claim is:

'1; In an abrading machine, a support, asad'- d'le base on said support, means slidably mount# ing said base on said support, said means including an outer pair' of parallel slide members dis-A posed at substantially right angles to said base, means pivotally' securing said slide members to saidbase, an inner slide member, means pivotallyl connecting said inner slide member-to said base` outer slide' members to said base.

3.` In an abrading machine, in combination, a

support, a saddle baseon said support, means slidably mounting said base on said support, said slide means including an outer pair of parallel slide members and means for angularly adjusting said base relative to said support and to said slide members in a horizontal plane, Aa saddle.

rockably carried by said base, a longitudinally movable work support carried by said saddle, and means angularly adjusting said saddle and work support relative to said base.

4. In an abrading machine, a saddle base formed with an elongated transversely concave saddle seat, a saddle having a convex seat engaging surface and formed with transversely extending T-shaped slots' in the convex surface thereof, locking bolts engaging in said slots and said base, worin gear teeth formed in the convex surface of said saddle, a worm meshing with said Worm gear teeth, a worm shaft rotatably carried by said base, an operator fixed to said shaft, a reciprocal work support carried by said saddle, and hydraulic means entirely within said saddle for recipe rocating said work support.

5. In an abrading machine, a support, a sad'- dle base on said support, means slidably mounting said base on said support, said means invcluding a pair of outer slide members,` and an inner slide member, means pivotallyA connecting said inner slide member to said base whereby said base may be swung about a verticalaxis, a saddle rockably carried by said base, locking bolts for said saddle, said outer slide members having rhorizontally elongated openings therethrough, flanged nuts threaded onto said bolts and extending through said openings, Worm gears xed to said nuts, worms meshing with said gears, and `worm operating shafts carried by said base;l

6. In an abrading machine, in combination, an elongated horizontal support, anelongated sad*- dle base seated on said support, said base having a longitudinal concave saddle seat in 4the upper side thereof, van elongated saddle formed with a convex lower side rockably engaging said seat, means mounting said base on said support for transverse sliding movement, said means include ing acentral pivot about which said base may rotate, a pair of parallel slides for said base, a pair of guides for said slides carried by said support, said saddle having a'pair of -T-shaped channels in the lower side thereof, a headed bolt for each channel having the head thereof engaging in said channel, a nut rotatably carried by' each slide and threaded onto said bolt, and means for rotating said nut whereby to simultaneously lock a slide relative to said base and also lock said saddle relative to said base.

*'7. In an abrading machine, in combination, a support, a saddle base on said support, means slidably mounting said base on said support, said means including an outer pair of parallel slide members, parallel guides for said slide members carried by said support, lmeans pivotally mounting said base on said support for adjustment about a, vertical axis; and releasable locking means for locking said slides to said base, said locking means including a threaded bolt, a nut threaded on said bolt and rotatably carried by a slide, gear teeth carried by said nut, and a threaded shaft engaging saidgear teeth and adapted to rotatably adjust said nut to either slide locking or slide releasing position,

` LOREN E. THOMPSON. 

